A cqxpoeatiost



June 9, 1925.

C. E. COCHRAN INDUSTRIAL TRUCK Filed Jari. 25. 1923 5 Sheets-Sheet lJune 9, -1925. 1,541,029

(3. E. COCHRAN INDUSTRIAL TRUCK Filed Jan. 25. 1923 5 Sheets-Sheet 2 Wa: MW BY 6 5 ATE '5.

June 9, 1925. 1,541,029

c. E, COCHRAN INDUSTRIAL TRUCK Filed Jan. 25. 1923 5 Sheets-Sheet 3 r IZZVYENTOR (Z/sci .AIIYS June 9,192.1 1,541,029

- c. E. COCHRAN INDUSTRIAL TRUCK Filed Jan. 25. 1923 5 Sheets-Sheet 4INYENTOR C y E W Arrm ill

Patented June 9, 1925.

(U NZITE D ST E S PATENT mm.

CLYDE E. CGCHEAIJ, OF CLEVELAND, GHIO, ASSIGNGR T0 333E1 1ELiNELL-PARKERELEC- TRIO COldIfANY, OF CLEVELAND, OHIO, A CDR-PORATIONOF OHIO.

INDUSTRIAL TRUCK.

Application filed January 25, 1923. .Serial 1570 614320.

To all 4031012 it may concern:

do it ln'iown that I, CL-Yon. E. Coonnnn, a citizen of the UnitedStates, i'esiding at Cleveland. in the iouuty ot (h yahoga and State ofOhio. have invented a certain new and useful Improvement in anIndustrial Truck of which the following is a full, clear, and exactdescription. reference being bad to the acconiliianying; drawings.

This invention. is concerned withindustrial trucks of the type whereinpovvm' means is pri'ivided tor driving the tri'iclc when irsuis'n'irtiiig loads, and is particularly rein corned with that class oftrucks known iu-the a 1 as tier. lift trucks.

[In trucks oi": the character referred to. it has been customary toprovide a loadlittingplatform supported on elevating mechanism carriedby an upright frame, there being power means to elevate a load only asinlicient distance to transport the load or to elevate the load togreater heights Whereby it may be stacked or transiterred to anothervehicle.- '.he lifting mechanism on such trucks has usually.comprisedvertieall v disposed screw members engaging a nuttixed to and n'iovnblewith. the elevating platlorin or a cable and winding; mechanisn'i.

lt has been found however, that aftruclx: equipped with a screwelevating: plattorn'i, when used during a considerable period. or merelyelevating a load to clear the sup porting: surface of the truck resultsin a wear or deterioration oi that portion oi the screw member which isthus repeatedly actinn on the nut secured to tlieplattorm. A subsequentuse of the truck for raising a load to a greater heig'ht, results in adistortion ot the screw member due to a binding actionbetween the screwmember and the 'WUZH and distorted nut. This objection is ilmnn-teristicoi? both single and dmihle screw li'l't arrangements.

It has also been found impractical to use a single cable directlyconnected to the elevating lllQL'liillllSll'i. as the possibility of the('2 hle breali in'g and thereby permitting the load to drop. with a.consequent damage or destruction of the truck frame, is lllfilySpresent. Flll'tllCllliOl'O. with the use ot'n double cable arrangementi'liractl c0nnected in the elevating mechanism. a distortimi orstraining otthe load elevating mechanism results as'one cable Willusually stretch moi'cthan the other.

,lVherel'ore. thegeneral object of thepres out invention istho'provision of a corninerciallv practical ai'itomotive industrialtruck which is readilyia daptable to the lifting and transportingotheavy loads on a load littingplatform and' which may also be utilizedto elevate and s'nick the'loads."

li'lore specifically, my invention" is concerned with the provision of anovehhe zivy dntv -po\ver opernted loadl-iltiug mechanism which may beembodied in an industri'z'il truck in such manner as to eliminate theforegoing discussed objectionable characteristics of present-day tiei'litt constructions.

in additional object of thepresent inven tion is the provision of acable inding mechanism adaptable for use in a tier litt truck and whichmay be provided \vit h separi'ztely acting flexible members nctuatingthe loadlilting members through a torque eipializing niechzinisin Wl.reby buckling or straining oilithe load li-iltni mechanism bv anyuneven stretching of; the respective cables is prevented.

A further object of my invention is to embody the means torfulfillingthe foregoing described objects in a power actunted. tier lil't truckhaving; universal characteristics of load liti'aing'. transporting andstacking provision being made for controlling the tiering mechanism froman operatoi."s

position on the truck.

Other objects will become apparentfrom the fOllOWiIlg' description taken,in connection with, the accompanying drawings and the essentialfeatures will be summarized in the claims.

In the drawingsl in. 1 is a side elevation ot an industrial tier litttruck embodying the various features oi my invention; Fig. 2 is a planview of the truck; Fig. 33 is an enlarged cross sectional elevationottlie truck taken substantially along the line 3-3 of Fig". 2; Fig. lis a side elevation of the rear portion of-the truck; Fig. 5 is anenlarged cross sectional view taken substantially along the line of Fig.1; Fin. 6 is a cross-sectional view talceu substantially along; the linetl-6 o1 l igxbgl io'. T

llll) is a detail cross sectional vie\vshowing a gear drive of thewinding mechanism corresponding to a section taken along the line 7-7 ofFig. 2; and Fig. 8 is a cross sectional view taken substantially alongthe line 88 of Fig. 2 and showing a solenoid brake mechanism acting onthe armature shaft of a winding motor.

Designating the variousmembers and elements comprising the truck, inFigs. 1 and 2, I show a truck frame comprising side frame members 10preferably formed of castings, and a rearwardly extending frame member11 secured thereto and formed to afford attachment for'small rearsteering wheels 12 and suitable steering mechanism (not shown).Attached'to the forward side frame members 10, are power driven wheels12*, the wheels being driven through suitable reduction gearing by amotor supported on the forward end of the truck. Upright angle members13 and 14 may be attached to the side members 10 and to an intermediatesupporting frame 9 comprising a support for a battery housing 15.Parallel members 16 provide floating engagement between the truck frameand the front axle housing. Provision for controlling movement of thetruck from an operators plat form which may be attached to the forwardend of the truck may be made in a manner well known in the art.

The construction of the frame, wheels, housing, etc. above mentioned,does not enter into the present invention; they may however be formedaccording to the disclosure set forth in my Patent No. 1,260,145 grantedMarch 1918 to the ElWBllPEH'lKQT Electric Company as my assignee.

The load lifting means extends over the rear end of the truck frame andis supported by a vertically extending structure disposed intermediatethe forward and rearward end of the truck. This structure may comprisechannel members 18 secured to the truck frame members 10 with theflanges thereof extending inwardly. These channel members are spacedapart a sufficient distance to provide a vertical support for L-shapedload lifting members 20 which ride thereon and coact therewith in amanner to be presently described.

The channel members extend a substantial distance above the top surfaceof the battery housing and are braced intermediate the top and bottomends thereof by angle members 21 and 22 secured to the battery housingframe and to the side faces of the channel members. A transverse topmember 241 preferably comprising a casting may be secured to the upperends of the channel members and serve as a spacing means therefor aswell as a supporting beam for cable sheaves A. removable load supportingplatform 19 is detachably secured to and carried by the arms and is ofsuflicient length to extend a substantial distance rearwardly over thesmall wheels 12 and is likewise of sufficient width to laterally coverthese wheels when the arms 20 are in a lowermost position. Suitablebearing bosses 20 may be formed on the arms to engage flat memhere 19secured to the under side of the platform 19.

To provide eflicient sliding engagement between the load lifting members20 and the upright frame, as well as to obtain a favorable cantileverreaction upon the frame when the arms 20 are carrying heavy load I havemounted roller members 25 adjacent the upper ends of verticallyextending portions 20 of the arms 20, and similar rollers 28 onstudsfixed to the lowermost portion of the arms. The arms 20 areprovided with integral extensions 20 affording a support for the rollerswhereby the rollers may engage the channel members of the frame. A barmember 26 extends through the arm portions 20 and affords lateralbracing of the arms and provides a suitable mounting for the rollers 25.The rollers 25 as will be seen in Fig. i, are disposed on one side ofthe channels while the rollers 28 are disposed on the opposite side ofthe channels and engage the upright frame along track members or strips18 secured to the forward and rearward flanges of the channels 18 byscrew members 19.

If desired, the rollers may be formed in the manner shown in Fig. 5 withflanges 29 engaging the beveled side faces of the track bars 18 and maybe hollow to receive anti-friction means comprising a bearing member 80rigidly mounted on the outer ends 26 of the bar member 26. The bear ingmember 31 is rigidly secured to the roller 25 by a removable cap member32. A similar bearing construction may be provided for the lower rollermembers 26.

It will be noted that the spaced apart and staggered relation of therollers 25 and 28 to the channel members 18 affords the maximum beamstrength of the channel members comprising the upright frame inresisting bending moments due to the lifting of heavy loads. A sleevemember 33 is positioned on the bar member 26 and abuts the bearingportions 20 of the arms 20 and thus prevents displacement ordisarrangement o l. the lateral relation to the load elevating arms.

The arms 20 are preferably actuated by :1 motor driven winding mechanism49 posh tioned on the top of the battery housing acting on a secondwinding mechanism carried by the arms 20; the latter mechanism actuatingpinions disposed within the flanges of the channel members 18. Thesepinions enlit) 'icrentia' pinions -14, the r gage vertically extending'aclc bars 36 se cured to the inside of the front flanges ot the channelniei'nbcrs 18. The two winding IllGCllilDlSHlS are connected by a par ofcables 50, the arrangement of the winding Il'lBUllfllllSlll carried bythe load elevating arms being such, that the lifting etlect oi eitherable is equally distributed to the pinion nien'ibers 35. By providingables of sufficient strength whereby either cable may suspend the loadwithout causing unbalanced stresses in the upright frame or load.lifting frame, I eliminate the disadvantages of a double :able hoist.

The n'icans tor distributing the reactive forces of either or bothcables will now be described.

As shown in Fig. 5, the pinions 3'5 are provided with inwa allyextending hub portionstlfi which are journaled in bearing portionsforming the upper ends of the arms 20. The pinions 35 are in rigidengagement with a t ansvtu'sely extending sha'it u'ien'ibcr ll whichcomprises a support tor a pair oi cable drums 4-2 rotatably niountmlthereon.

Disposed between the drum members and rigidly fastened to the shaft. isa spider member 43 comprising a bearing for (litterential pinions e l,preferably three in munber, which engage bevel gear teeth h) termed onthe end walls 4-2 of the drum n'icinbcrs 4-2.

The operation of this di'tierential arrang mcnt is as lollows:- Vhc'nthe arms 20 are in their lowermost position. the grooves of the drum arecompletely tilled with stretches of cables 50 wound thereon, the drumsbeing; of sutlicient diameter to receive stretches of cables suchlength. as to correspond to the -full vertical travel of the loadlifting mechanism. lllalting' in or winding" up of the cable stretches50 by the winding incchai'iism disposed on the battery housing causes anunwinding ol corrcsponding portions of the cables c'sposed on the drums42, thus efiecting' a rotation of the drum menil'iers and rotation ofthe shaft 4.1. The pinions thus move along the rack bars 36 and an upiard movement 5 the elevating niechanisn'r ctlectcd. It the load is lightand the quality of the cables 50 is uniform throughout, there will be prrlly no inov nent ot the d"? erential pinions merely acting; as aconiwction between the beveled tccth on the drun'is and the spidermember l3 rigid with the shaft +l-l. It however. there is an unequalrelative stretching of the cables 50, there will. be a relativemovement. between the drums which will be compensated by thedili'erential pinions ll.

The same degree ot stress is thus exerted on either cable ln'eaks, thedrums will become interengaged when the lugs engage each other. Thedrain members 42 are placet upon the shatt -11 with the lug members 46,disposed substantially 180 apart as shown in Fig. 6, and are thusmovable through substantially one-halt revolution relative to each.other betore they Either cable may thus stretch a distancecorresponding; to a one-halt drum turn thereo't'before the noperbalancing of the load outhe cables would be interfered with.

The winding i'nechanisin disposed on the battery housing as hereinbetorestated may be motor actuated and may comprise a motor 49 having thecasing thereof supported by a i i-tune 5i secured to the top surface ofthe battery housing. The frame 51 may support a second pair oil. cabledrunis which act upon the cable stretches 50.

The cable stretches 50 extend upwardly in a substantially verticaldirection 'troni the load lifting mechanism and over the sheave. members.23. the latter members being supported by a var 54L rigidly moinited ondown \ardly extending b 'acltet portions 23* termed on the top t an-1emember These bracket portions fl are spaced apart a sutiicient distanceto permit a transverse shitting ot the sheaves 20 as the cable stretches50 move t 'ansversely due to the winding action. of the drums.

The winding; drums are driven by the motor 45) through suitablereduction gearing which may comp .c a bevel pinion 5t: mounted on ashaft 57 journaled in the frame ill and connected to the armature shaft49 ot the motor by a flexible coupling The pinion 56 engages a bevelgear (30 which mounted on a sleeve 61, the latter lneinbe engaging: ashaft (it? :arrying a worm 353. The bevel gear (it) and shaft ()2 may beprovided with anti-traction bearings as indicated at ($4: and ()5respectively. The worm gearinn comprise, a worm wheel to il 'asteucd tohe druin shatt 63''. All of the "foregoing dcscribed reduction gearingmay be suitably housed bv a casing); 51. forming part (it the name or.

To arrest rotation of the motor inin'iedb ately upon disctnnoction oithe power. I provide a suztable braliaa shown as con prising' a'triction disc Tl secured to the arnnn turc sha'tt ll of the in-oh r55). a cnp-shapcd lilo lltl

the coils may be connected in series with the armature of the motor.Anti-friction means 76 may be secured to either rotating disc member orthe magnetically actuated plate 72. The deenergizing of the motor,deenergizes the coil. which is acting in op position to the springmembers Ti. The spring'members thus urge the disc members 79. outwardlyand compress the anti-friction band 76 against the rotating face of thedisc member 70 and the rotation of the arnmtru'e oi the motor isimmediately arrested, thus preventii an undesirable over movement oi?the winding drum and load clc' ai'in mechauism.

it is desirable that the control means for the winding motor 4,9 belocgted adj the drivers position on the truck. it also desirable thatthe controller means be asso- ,:iated with means automaticaily operatedupon an extreme upper or lower movement of the load ele' 'ating;mechanism to automatically stop the winding; motor. The latter means maybe embodied in a mechanism such as has been disclosed for a similarpurpose in the Towsou atent No. 1,288,825 issued July 1'7, 1917, whichdiscloses a mechanism adapted to be actuated upon an extreme movement ofa load lifting platform on an hidustrial truck and tcontrol a motoractuating the platform. I accordingly provide a. double switch, asindicated at 80 which may be disposed on the truck beneath the batteryhousing 15' suitabie elecrical coimectious (not shown) extending fromthe battery to the switch and from the switch to the motor may serve toconnect the battery of the vehicle to the motor.

Such a switch mechanism 80 may comprise a double contact blade 8icarried. by a rocker arm 82 which may be manually operated by a controllever 88 disposed on the forward end of the truck adjacent the driversposition. A bell crank is connected to the lever 83 by a rod member 85and to the switch arm 82 by a link member 87. An upward or a downwardmovement of the control lever 83 will cause the motor to drive thewinding mechanism in un indiugr or winding direction respectively.

Siidably mounted adjacent the torward cud oi? the vertical i'ramcstructure, is a switch actuating member carrying adjustable stopmembers 90 which are mounted on the member 90 in such manor as to beengz'afzed by the sleeve 32-3 of the load lifting frame upon an extremeupward or downward movement of the load lifting platform. The switchblade 81 is thus shifted to a neutral position out of engagement withthe contacts F11. The rod member 90 is connected to the switch 80through a bell crank member 91 and a coimectingr rod 92 which ispreterably connected to a bell crank member 8% mounted on the forwardend of the truck.

Spring members 9% are mounted on the rod 92 to oppose each other and toengage a plate 95 rigidly mounted on the truck frame whereby the switchmechanism 80 is maintained in anormally open condition. The windingmechanism will thereiore be active only when the switch mechanism ismanually maintained closed by the operator holding the lever in anupward or downward position.

it will thus be seen that the load lifting mechanism may be controlledfrom the terward end of the truck which is pre'lerably the operatorsposition, there being a stand ing platform for the operator (not shown)adapted to be mounted on bracket members 10 rigidly secured to the truckframe.

Many advantages may be found in the embodiment of my invention in aheavy duty automotive truck among which are the use of more than oneflexible member or cable to elevate the load engaging means without thedisadvantage or annoyance of having lo continually adjust the mechanismto maintain an equal load on each of the cable members, the load liftingmechanism being such to automatically fulfill this purpose: theobtaining of a commercially practical heavy duty truck of ordinary sizewhereby the iioor space required for the movement and operation of thetruck is not unusual whil 2 at the same time obtaining an extraordinarylifting capacity in this character of truck; and the elimination oi? thepossibility or damage to the truck frame in the event one of the cablemembers should break. Furthermore the reacting forces between theupright frame and the load lifting mechanism are such as to contributeto the ultimate lifting force exerted upon the load when the same isbeing elevated.

I claim 1- 1. In an industrial truck, the combination of a motor drivenwinding mechanism rigidly fixed relative to the truck frame, an uprightframe structure, a second winding mechanism actuated by the first namedmechanism and relatively movable thereto, e load liftingsupport movablewith the second winding mechanism, flexible members associated with bothof the winding mechanisms and reacting on said upright frame structure,whereby the winding action of the motor driven winding; mechm nism uponthe flexible members will effect an unwinding; action of the secondnamed winding mechanism and impart movement to the load support whilebeing guided by the upright frame structure.

2. In an industrial truck, the combination of a power-operated. windingmechanism rigidly mounted on the truck, an upright frame structure, asecond winding mechanism relatively movable thereto and actuatedthereby, stretches of cable assoill ciated with the respective windingmechanisms and extending over the frame? structure a load supportmovable with the'second named windingmechanism whereby a lakingin actionof the cables by the poweroperatcd winding mechanism will effect thesecond named winding mechanism in such manner as to pay out the cableand result in the in'iparting of movement to said load support alongsaid upright frame struc ture.

23. In an automobile truck, the combination of an upright frame rigidwith the frame of the truck, a load lifting frame guided by the uprightframe and relatively movable thereto, a power-operated winding mechanismsecured to the frame of the truck, a second winding mechanism mounted onone end said load lifting frame adjacent the upright frame, and powertransmitting'means connecting thetwo winding mechanisms wherebyoperationof'the windiug mechanism on the truck frame will cause thesecond named winding mechanism to elevate or lower said load liftingframe.

4. In an industrial truck having powerdriven wheels, the combination ofa vertically extending frame rigid'with the frame structure of thetruck, a power-operated winding mechanism mounted on the truck, a loadlifting mechanism mounted on the upright fI'tU'l'lG including pinionscooperating with racks on the upright frame and adapted to traverse thelength thereof, including a winding mechanism mounted thereon andactuated by said 'first named winding mechanism to actuate the pinionsand torque equalizing means operatively disposed between the pinions andsaid last named winding mechanism.

5. In an automotive industrial truck. the combination of an uprightframe structure rigid with the frame of the truck, and load elevatingmechanism movably mounted on said upright frame structure comprising aload carryingplatform, outwardly extending members engaging the uprightframe structure and supporting the platform, and actuating mechanismincluding cable drums, rack bars rigid with the upright frame structurepinions rotatably mounted on the loa d elevating mechanism and torqueequalizing means connecting said pinions and drums whereby the load onsaiddrums may he equalized when raising a load.

6. In an industrial truck having powerdriven wheels, the combination ofa vertically extending frame rigid with the frame structure of thetruck, a power-operated winding mechanisn'i mounted on the truclc a loadlifting mechanism mounted on the upright frame and adapted to traversethe length thereof. including a winding mechanism. an unwinding actionof which. effects an elevating movement of the load lifting mechanismand flexible members connecting the two winding mechanisms and extendingover the upright frame structure.

'7. In an autoi'notive industrial truck, the combination of an uprightframe structure rigid with the frame of the truck, a load elevat'ngmechanism movably mounted on said upright frame structure, a windingmechanism on the truck, and actuating mechanism including rack barsrigid with the upright frame structure, flexible members connecting saidwinding. andactuating mechanisms, pinions rotatably mounted on the loadelevating mechanism and engaging the rack bars and reactive meansengaging the upright framestructure and serving to maintain the pinionsin meshing relation with the racks.

S; In'an industrialtruclg the combination of an upright frame structurerigid with theframe of the truck, a load'lifting mechanism movablymounted on the. upright structure a windingmechanism mounted on thetruck frame including a pair of cable winding drums, cables connectingthewinding mechanism with the load lifting mechanism, drums therefor andcompensating meansincluding gears connecting the winding mechanism tothe load liftingmechanisni wl'iereby an equal tension may be ex erted oneach cable when there is an uneven stretching of the cables during aload lifting operation.

9. In a truck, the combination of an upright frame structure rigid withthe frame ofthe truck. a load lifting mechanism movably mounted on saidupright frame and actuating mechanism including rack bars, pinionsengaging the rack bars, relatively movable elements, and torqueequalizing means drivingly connecting the elements to the'pinionswhereby the actuating mechanism will cause the elements to be equallyeffective in moving the load lifting mechanism.

10. In a truck. the combination of upright frame members rigidly securedto the frame of the truck, a load elevating'mechanism, rack bars mountedon the upright frame members power-operated means for actuating the loadlifting mechanism comprising gear members coacting with the rack barsand rotatably mounted on the load lifting'mechanism the reactive meansmovably embracing the upright members to maintain the gears and bars inmeshing relation and power-operated winding drumsactuating said gearmembers.

11. In an industrial truck, the combina" tion of a motor driven windingmechanism rigid relative to thetruck frame, a second winding mechanism'actuated by the first named mechanism and relatively movable thereto. aload lifting support movable with the second winding mechanism. flexiblemembers associated with both of the winding mechanisms, whereby thewinding action of the motor driven winding mechanism upon the flexiblemembers will effect an un winding action of the second named windingmechanism and impart movement to the loadsupport, and torqueequalizing); means embodied in the second named winding mechanism tocause the flexible members to be equally loaded.

12. In an industrial truclz, the combination of a power-operated windingmechanism rigidly mounted on the truck, a plu rality of cables actuatedby the winding mechanism, a load support moved by the cables and adifferential gear mechanism equalizing the load on the respective ables.

13. In an industrial truck having a frame and power driven wheels, thecombination of an upright frame rigid with the truck frame, apower-operated winding mecha nism mounted on the frame of the truck, aload lifting support movably mounted at one end on the upright frame, asecond winding mechanism mounted on the support adjacent the uprightframe and actuated by said first named winding mechanism and rollermembers engaging the upright frame and arranged to take the reactioncaused upon movement of the second named wind- 'ing mechanism along saidupright frame.

14-. In an industrial truck,'the combination of a power-operated windingmechanism rigidly mounted onthe truck, motor therefor, an upright framealso rigidly mounted on the truck, a load lifting mechanism associatedwith said upright frame, a second winding mechanism active to move theload lifting mechanism each of said winding mechanisms including cabledrums and cables associated therewith in such man nor that a windingaction of the drums of one of the winding mechanisms effects anunwinding action of the drum corresmonding; thereto included in thesecond named winding mechanism and thereby imparts movement to the loadlifting 'ilatform and torque equalizing means operatively disposedbetween the drums.

15. In an industrial truck, a power driven winding mechanism rigidlymounted on the truck, an upright frame rigid with the truck frame, aload lifting support movably mounted on the uprightframe, a secondwinding mechanism associated with the support andactive to raise thesupport during an unwinding action thereof effected by a winding actionof the power-operated winding mechanism, cable members extending overthe upright frame structure, and drums included in each of the windingmechanisms adapted to act on the cables whereby a winding action on thecable of the drum of one of the winding mechanisms will cause anunwinding action of one of the drums of the other windi 11g mechanismand thereby imnism associated with the load lifting plat;-

form, cable members connecting the resusctive winding mechanism and aplatform actuating mechanism associated with the second named windingmechanism and the upright frame including; rack members and gear membersassociated therewith and reactive means engaging the frame structure andserving to maintain the rack and gear members in cooperative relation.

17. In an industrial truck of the character described, an upright framestructure rigidly mounted on the frame of the truck, load lifting meansassociated therewith in cluding; an elevating platform, aclr barsrigidly mounted on the upright frame structure, gear members coactingtherewith and movable with the platform, power driven means rigidlymounted on the truck, power transmitting means associated with said lastnamed means and with the load platform to impart rotation to said gearmembers associated therewitlnwhereby said gear members eoact with therack members to raise and lower said lead lifting; platform and meansmounted on the load lifting platform for maintaining the rack and, gearmembers in cooperative relation when the platform is moved.

18. in an automotive truck of the character described, the combinationof a poweroperated winding i'uecl'ianisni rigidly mountsociated with theplatform of the upright frame structure driven by either of said drumsand torque equalizing means rormccting the drums to said shaft wherebyth cables associated with either of the drums may be eflj'ectivc inimparting; movement to said gearing mechanism and the load liftinplatform. 7

19. In an industrial truck of the character described, the combinationof an upright frame structure rigid with the frame structo re of thetruclcimzluding rack members, a load lifting mechanism associated withthe upright frame structure, power-operated means also mounted on thetruck, said load lifting mechanism including gear members disposed onopposite sides thereof adjacent the sides of the upright framestructure,

cable drums associated with said gearing, and flexible cable membersarranged to be wound on said drums and associated with saidpowermperated means, whereby a drawing;- in of the cable members by saidPOWC1()P erated means will unwind the cables from said drums and causean elevating movement of said load elevating mechanism, and a paying outof the cables by said means will permit said drums to rewind the cablesdurinna lowering movement of said load elevating means and means movablewith the load elevating); means for maintaining the ,Q'QHI'S in meshingrelation with the racks.

20. In an automotive truck of the character descril'ied, the combinationof an upright frame rigid with the frame of the truck, a cable windingmechanism having a plurality of drums, a load lifting frame associatcalwith said upright frame struc turc, a pair of independently revolnbledrums rotatably mounted on said load lifting: frame, actuating meansoperable to cause said load lifting frame to traverse the length of theupright frame structure, and means disposed between. said drums to causeinter-engagementthereof after a predetermined independently revolvingmovement thcrebetween.

21. in an imjlustrial truck, a power driven winding mechanism rigidlymounted on the trucl-i. an upright frame rigid with the truck frame. aload lifting siu'lport morality mouiitcd on the upright frame. a secondwinding mechanism associated with the sup port. and active to raise thesupport during an ui'iwinding' action thereof effected by a winding'action of the power-operated wind inn mechanism, cable members, drums included in each of the winding mechanisms adapted to act on the cableswhereby a winding action on the cable of the drum of one of the windingmechanisms will. cause an unwinding action of one of the drums of thother winding; mechanism and thereby impart movement to the loadsupport. and means cooperating with each of the drums for equalizing:the load on each of the cable members.

22. In an industrial truclet-he combination of a power-omerated windingmechanism rigidly mounted on the truck, a motor therefor, an uprightframe also rigidly mounted on the truck, a load lifting mechanismincluding: roller members engaging the forward and rearward portions ofthe upright frame, a second winding mechanism active to move the loadlifting mechanism. each of said winding mechanisniis including cabledrums and cables associated therewith in such nmnner that the reactionof unwinding the 'ables from the drums is taken. up by the upright framethrough said rollers.

533. In an. industrial truck of the characdescribed, a motor drivenmechanism mounted on the truck, an upright frame also mounted on thetruck, a load lii'itingg; platform associated therewith and relativelymovable thereto, a second winding mechanism ssociated with the loadlifting platform, cable members connecting the respective windingmechanisms, a platfm'm actuating; mechanism associated with tl secondnamed windinglllGCllzlhlSl'll and the upright frame including: rackmembers on the frame and gear members movable with the load liftingplatform and means for equalizing: the load onthe cable members and onthe rear members.

2%. ln an industrial truck of the character described, an upright framestructure rigidly mounted on the frame of the truck, load lifting meansassociated fillQlGV-Jli'll ineluding an elevating platform. and a.pinrality of cable m mbers, racl bars rigidly mounted on the uprightframe structure, gear i'nembers coaeting therewith and movable with theph -.tform, power means rigidly mounted on the truck and actuating thecable members. and the load platform and torque equalizing meansdrivingly disposed between the gear n'iembers and the cable memberswhereby each of the cable members may be effective in actuating said,e'ear members.

25. In an automotive truck of the character described, the conibiimthmof powcn operatedv winding mechanism rigidly mounted on the truck; anupright franlc structure also mounted on the truck, a load liftingmechanism associated with the upright frame structure and relativelymovable thereto, cable members c mnccting the winding}; mechanism withthe load lifting mechanism. and a. differential gear means equalizingthe load on the cable members.

26. In an industrial truck of the character described, the combinationof an uprigl'it frame structure rigid with the frame structure of thetruck, a load lifting mechaism associated with the upright framestructure, power-o )erated means also mounted on the truck, said. loadlifting mechanism includiire gear members disposed on opposite sidesthereof adjacent -the sides of the upr i rht frame structure, and rackbars riggi d with the. upri ght frame, a cable drum associated with saidgearing and rotatably mounted on the load lifting mechanism, a flexiblecable member arranged to be wound on said drum and actuated by saidpower-operated n'ieans. whereby a drawing in of the cable by said illOpower-operated means will unwind the cable from said drum. and cause anelevating movement of said lead elevating mechanism and anti-frictionroller n'iembers mov-- able with the load lifting mechanism formaintaining the raclcand gear members in mesh.

27. in an automotive truck of the charactor described, the combinationof an up right frame rigid with the fran'ie of the truck, a cablewinding mechanism having a plurality of drums, a load lifting frameassociated with said upright frame structure, a pair of independentlyrevoluble drums rotatably mounted on said load lift ing fran'ie, frameactuating means operable to cause said. lead frame to traverse thelength of the upright frame structure, including a pair of cables, andmeans causing said drums to become relatively non-rotatable wherebyeither of said cables may be effective in elevating said load liftingframe.

28. in an industrial truck, the combination of an upright framestructure rigid with the frame of the truck, a load lifting mechanismmovably mounted on the upright structure, a winding mechanism mounted onthe truck frame, cables connecting the winding mechanism With the loadlifting mecha nism, and power equalizing means interposed between thewinding mechanism and the load lifting mechanism for evenly distributingthe load on the cables.

29.111 an industrial truck, the combination of an upright framestructure rigid with the frame of the truck, a load lifting mechanismmovably mounted on the upright structure, a winding mechanism mounted onthe truck frame, cables connecting the winding mechanism with the loadlifting mechanism, rack bars on the upright frame, gear members engagingthe rack bars and movable with the load lifting mechanism, and means forevenly distributing the load lifting force of the cables to said gears.

30. In a truck, the combination of an upright frame structure rigid withthe frame of the truck, a load lifting mechanism movably mounted on saidupright fran'ie struc* ture, comprising members extending outwardly fromthe upright frame structure and adapted to support a load, and actuatingmechanism including rac bars 1 the frame structure, a shaft mem ablymounted on said lead support hers, a plurality of drums rotatably on theshaft member, torque equal 2 means comiecting the shaft member and thedrums, and pinions mounted on the shaft member and engaging said rackbars, whereby actuation of the shaft member will cause the pinions to beeffective in moving the load supporting men'ibers.

31. In a truck, upright frame members 'lly secured to the frame of thetruck,

ri u a load elevating mechanism, rack bars mounted on the upright framemembers, pinions engaging said rack bars, a poweroporated means foractuating the load lift inn mechanism comprising a shaft. memberrotatahly mounted on the load lifting 'l1'l(;ll12l nism, cable \i'indingelements on the shaft member and torque equalizing means con-- nectingthe shaft member and the winding elements.

ll. load elevating .r iechanism comprising an upright frame, loadelevating means ti; versing the frame, a plurality of cables extendingupwardly and passing over he frame adjacent its top, and rotatablestress equalizing means connecting the cables to the load elevatingmeans, whereby the lift ing load will be equally distributed to all thecables.

In a load elevating mechanism. the combination of an upright frame, loadelevating means mounted thereon, a plurality of cables for moving theload, elevating means, rotatable stress equalizing means fordistributing the load equally on the cables and reaction means actuatedby the cables when taut and acting on said frame to move the load.

34. A load elevating mechanism comprising an upright frame, loadelevating means traversing the frame, a pair of cables ei; tendingupwardly passing over the frame adjacent its top, load equalizing meansconnecting the cables to the load elevating means, and means forshifting the entire load to one of the cables when the other cablebreaks.

In testimony whereof, I hereunto allix my signature. V V

CLYDE l l. GQCHRAM.

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